U.S. patent application number 17/528287 was filed with the patent office on 2022-05-19 for automatic regulation system for the weight of a dumbbell.
This patent application is currently assigned to Technogym S.p.A. The applicant listed for this patent is Technogym S.p.A. Invention is credited to Simone CASAGRANDE.
Application Number | 20220152443 17/528287 |
Document ID | / |
Family ID | 1000006024975 |
Filed Date | 2022-05-19 |
United States Patent
Application |
20220152443 |
Kind Code |
A1 |
CASAGRANDE; Simone |
May 19, 2022 |
AUTOMATIC REGULATION SYSTEM FOR THE WEIGHT OF A DUMBBELL
Abstract
The present invention relates to a system (S; S') for adjusting
the weight of a dumbbell, that can be used by a user for carrying
out a gymnastic exercise, comprising: a supporting frame (1); at
least one dumbbell (2; 3), housed on said supporting frame (1),
provided with a handgrip (21; 31), having an axial development
along an axis (R), capable of rotating around said axis (R) and
provided with a first end (211; 311) and a second end (212; 312), a
first plurality of weights (P1; P3), arranged on said supporting
frame (1), wherein each weight can be locked individually at said
first end (211; 311) by means of first locking means (214; 314),
when said handgrip (21; 31) rotates towards a locking position, and
can be unlocked from said first end (211; 311), when said handgrip
(21; 31) rotates towards an unlocking position, a second plurality
of weights (P2; P4), arranged on said supporting frame (1), wherein
each weight can be locked individually at said second end (212;
312) by means of second locking means (215; 315), when said
handgrip (21; 31) rotates towards a locking position, and can be
unlocked from said second end (212; 312), when said handgrip (21;
31) rotates towards an unlocking position, said system (S) being
characterized in that it comprises at least one actuating device
(4-4'; 5-5'), arranged on said supporting frame (1), configured for
causing the rotation of said handgrip (21; 31) around said axis
(R), from said locking position towards said unlocking position and
vice versa, so as to select the weight to be locked to or to be
unlocked from said handgrip (21; 31) for carrying out the gymnastic
exercise.
Inventors: |
CASAGRANDE; Simone; (Cesena,
IT) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Technogym S.p.A |
Cesena |
|
IT |
|
|
Assignee: |
Technogym S.p.A
Cesena
IT
|
Family ID: |
1000006024975 |
Appl. No.: |
17/528287 |
Filed: |
November 17, 2021 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A63B 21/0728 20130101;
A63B 21/4035 20151001; A63B 21/075 20130101; A63B 21/0726
20130101 |
International
Class: |
A63B 21/075 20060101
A63B021/075; A63B 21/072 20060101 A63B021/072 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 17, 2020 |
IT |
102020000027507 |
Claims
1. System (S; S') for adjusting the weight of a dumbbell, that can
be used by a user for carrying out a gymnastic exercise,
comprising: a supporting frame (1); at least one dumbbell (2; 3),
housed on said supporting frame (1), provided with a handgrip (21;
31), having an axial development along an axis (R), capable of
rotating around said axis (R) and provided with a first end (211;
311) and a second end (212; 312), a first plurality of weights (P1;
P3), arranged on said supporting frame (1), wherein each weight can
be locked individually at said first end (211; 311) by means of
first locking means (214; 314), when said handgrip (21; 31) rotates
towards a locking position, and can be unlocked from said first end
(211; 311), when said handgrip (21; 31) rotates towards an
unlocking position, a second plurality of weights (P2; P4),
arranged on said supporting frame (1), wherein each weight can be
locked individually at said second end (212; 312) by means of
second locking means (215; 315), when said handgrip (21; 31)
rotates towards a locking position, and can be unlocked from said
second end (212; 312), when said handgrip (21; 31) rotates towards
an unlocking position, said system (S) being characterized in that
it comprises at least one actuating device (4-4'; 5-5'), arranged
on said supporting frame (1), configured for causing the rotation
of said handgrip (21; 31) around said axis (R), from said locking
position towards said unlocking position and vice versa, so as to
select the weight to be locked to or to be unlocked from said
handgrip (21; 31) for carrying out the gymnastic exercise.
2. System (S; S') according to claim 1, characterized in that it
comprises a logic control unit (U) capable of sending control
signals to said at least one actuating device (4-4'; 5-5').
3. System (S; S') according to claim 1, characterized in that said
logic control unit (U) can be connected with at least one remote
device (D.sub.R), for receiving signals corresponding to the weight
adjustment.
4. System (S; S') according to claim 1, characterized in that said
at least one dumbbell (2; 3) comprises a gear (213; 313) fixed to
said first end (211; 311) or to said second end (212; 312), capable
of engaging with said at least one actuating device (4-4';
5-5').
5. System (S) according to claim 1, characterized in that said at
least one actuating device (4; 5) comprises a motor (41; 51) and a
worm screw (51; 52) that can be actuated by said motor (41;
51).
6. System (S) according to claim 5, wherein said at least one
dumbbell (2; 3) comprises a gear (213; 313) fixed to said first end
(211; 311) or to said second end (212; 312), capable of engaging
with said at least one actuating device (4-4'; 5-5') and wherein
said gear (213; 313) is capable of engaging on said worm screw (42;
52), so as to cause the rotation of said handgrip (21; 31) around
said axis (R), from said locking position towards said unlocking
position and vice versa.
7. System (S') according to claim 1, characterized in that said at
least one actuating device (4'; 5') comprises a motor (41'; 51'), a
first gear (42'; 52') that can be actuated by said motor (41'; 51')
and a second gear (43'; 53'), that can be actuated by said first
gear (42'; 52').
8. System (S') according to claim 7, wherein said at least one
actuating device (4'; 5') comprises a motor (41'; 51'), a first
gear (42'; 52') that can be actuated by said motor (41'; 51') and a
second gear (43'; 53'), that can be actuated by said first gear
(42'; 52') and wherein said gear (213; 313) is capable of engaging
on said gear (43'; 53'), so as to cause the rotation of said
handgrip (21; 31) around said axis (R), from said locking position
towards said unlocking position and vice versa.
9. System (S') according to claim 7, characterized in that said at
least one actuating device (4'; 5') comprises a lock/unlock pin
(44'; 55'), capable of moving from an engagement position with said
second gear (43'; 53'), to a disengagement position from said
second gear (43'; 53').
10. System (S') according to claim 7, characterized in that said
supporting frame (1) comprises at least one lock/unlock pin (216;
316) capable of engaging with said at least one dumbbell (2; 3) for
preventing rotation of said handgrip (21; 31).
11. System (S; S') according to claim 1, characterized in that it
comprises a second dumbbell (3) housed on said supporting frame
(1), comprising a handgrip (31), having an axial development along
an axis (R), capable of rotating around said axis (R) and provided
with a first end (311) and a second end (312), a first plurality of
weights (P3), arranged on said supporting frame (1), wherein each
weight can be locked individually at said end (311) by means of
first locking means (314), when said handgrip (31) rotates towards
a locking position, and can be unlocked from said first end (311),
when said handgrip (31) rotates towards an unlocking position, a
second plurality of weights (P4), arranged on said supporting frame
(1), wherein each weight can be locked individually at said second
end (312) by means of second locking means (315), when said
handgrip (31) rotates towards a locking position, and can be
unlocked from said second end (312), when said handgrip (31)
rotates towards an unlocking position.
Description
RELATED APPLICATIONS
[0001] This application claims the benefit of priority of Italy
Patent Application No. 102020000027507 filed on Nov. 17, 2020, the
contents of which are incorporated herein by reference in their
entirety.
FIELD AND BACKGROUND OF THE INVENTION
[0002] The present invention relates to an automatic regulation
system for the weight of a dumbbell, in particular of a dumbbell
for carrying out a gymnastic exercise.
[0003] More in detail, the invention relates to a system, designed
and manufactured in particular for automatically regulate the
weight amount to be loaded on a dumbbell for carrying out a
strength gymnastic exercise, but that can be used for any gymnastic
exercise that includes the use of a dumbbell.
[0004] In the following, the description will be directed to a
dumbbell comprising a plurality of adjustable and selectable
weights on the basis of the strength gymnastic exercise to be
carried out, but it is clear that it should not be considered
limited to this specific use.
[0005] As is well known, strength training systems are currently
used to develop strength and improve the muscular resistance of a
user.
[0006] Activities typically associated with strength training
involve the use of resistance, often in the form of weights, to
cause the muscles contraction of a user, increasing muscle strength
and the function of tendons, ligaments, and joints.
[0007] Therefore workouts may require the use of free weights, such
as barbells and dumbbells, wherein a user controls the movement or
the position of these weights over a time period or for a number of
sets and reps.
[0008] During the execution of the exercises with free weights, a
user may do movements unconstrained by supportive equipment, and
thus a user often carries out such movements in an equipment-free
environment.
[0009] Usually, both dumbbells and barbells include a rod or
handgrip, at the ends of which one or more weights, usually having
a circular shape, are fixed on the base of the resistance required
for the execution of the exercise.
[0010] Often the insertion of the weights on the rod is an
operation that requires the user to stop doing exercises for a
prolonged period, necessary to load or unload the weights.
[0011] Therefore, compact weight loading systems are common, mainly
used for dumbbells, in which, by means of an actuating device, it
is possible to select the weight from a plurality of weights
already arranged near the rod, thus reducing the loading and
unloading times by the user.
[0012] However, these known systems are manual, usually requiring
the user to rotate the dumbbell grip to activate a weight locking
and unlocking system.
[0013] Therefore known systems require the intervention of the
user, who is forced to interrupt his training in order to adjust
the intensity of the resistance necessary for the execution of
strength exercises.
SUMMARY OF THE INVENTION
[0014] In the light of the above, it is, therefore, an object of
the present invention to provide an automatic weight adjustment
system for a dumbbell.
[0015] A further object of the present invention is to provide a
mechanically simple and reliable system.
[0016] Another object of the invention is to provide a system that
allows a user to remotely adjust the weight to be loaded on the
dumbbell.
[0017] It is therefore specific object of the present invention a
system for adjusting the weight of a dumbbell, that can be used by
a user for carrying out a gymnastic exercise, comprising a
supporting frame, at least one dumbbell, housed on said supporting
frame, provided with a handgrip, having an axial development along
an axis, capable of rotating around said axis and provided with a
first end and a second end, a first plurality of weights, arranged
on said supporting frame, wherein each weight can be locked
individually at said first end by means of first locking means,
when said handgrip rotates towards a locking position, and can be
unlocked from said first end, when said handgrip rotates towards an
unlocking position, a second plurality of weights, arranged on said
supporting frame, wherein each weight can be locked individually at
said second end by means of second locking means, when said
handgrip rotates towards a locking position, and can be unlocked
from said second end, when said handgrip rotates towards an
unlocking position, said system may comprise at least one actuating
device, arranged on said supporting frame, configured for causing
the rotation of said handgrip around said axis, from said locking
position towards said unlocking position and vice versa, so as to
select the weight to be locked to or to be unlocked from said
handgrip for carrying out the gymnastic exercise.
[0018] Further according to the invention, said system may comprise
a logic control unit capable of sending control signals to said at
least one actuating device.
[0019] Preferably according to the invention, said logic control
unit may be connected with at least one remote device, for
receiving signals corresponding to the weight adjustment.
[0020] Still according to the invention, said at least one dumbbell
may comprise a gear fixed to said first end or to said second end,
capable of engaging with said at least one actuating device.
[0021] Always according to the invention, said at least one
actuating device may comprise a motor and a worm screw that can be
actuated by said motor.
[0022] Further according to the invention, said gear may be capable
of engaging on said worm screw, so as to cause the rotation of said
handgrip around said axis, from said locking position towards said
unlocking position and vice versa.
[0023] Preferably according to the invention, said at least one
actuating device may comprise a motor, a first gear that can be
actuated by said motor and a second gear, that can be actuated by
said first gear.
[0024] Still according to the invention, said gear may be capable
of engaging on said gear, so as to cause the rotation of said
handgrip around said axis, from said locking position towards said
unlocking position and vice versa.
[0025] Again according to the invention, said at least one
actuating device may comprise a lock/unlock pin, capable of moving
from an engagement position with said second gear, to a
disengagement position from said second gear.
[0026] Further according to the invention, said supporting frame
may comprise at least one lock/unlock pin capable of engaging with
said at least one dumbbell for preventing rotation of said
handgrip.
[0027] Preferably according to the invention, said system may
comprise a second dumbbell housed on said supporting frame,
comprising a handgrip, having an axial development along an axis,
capable of rotating around said axis and provided with a first end
and a second end, a first plurality of weights, arranged on said
supporting frame, wherein each weight can be locked individually at
said end by means of first locking means, when said handgrip
rotates towards a locking position, and can be unlocked from said
first end, when said handgrip rotates towards an unlocking
position, a second plurality of weights, arranged on said
supporting frame, wherein each weight can be locked individually at
said second end by means of second locking means, when said
handgrip rotates towards a locking position, and can be unlocked
from said second end, when said handgrip rotates towards an
unlocking position.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
[0028] The present invention will be now described, for
illustrative but not limitative purposes, according to its
preferred embodiments, with particular reference to the figures of
the enclosed drawings, wherein:
[0029] FIG. 1 shows a top perspective view of the automatic weight
adjustment system for a dumbbell, object of the present
invention;
[0030] FIG. 2 shows a top view of the system shown in FIG. 1;
[0031] FIG. 3 shows a side view of the system shown in FIG. 1;
[0032] FIG. 4 shows a further top perspective view with covering
carter of the system shown in FIG. 1;
[0033] FIG. 5 shows a top perspective view without the covering
carter of the system shown in FIG. 4;
[0034] FIG. 6 shows a top view of a detail of the system shown in
FIG. 5;
[0035] FIG. 7 shows a sectional side view of a detail of the system
shown in FIG. 5;
[0036] FIG. 8 shows a top perspective view of a second embodiment
of the automatic weight adjustment system for a dumbbell, object of
the present invention;
[0037] FIG. 9 shows a sectional front view of the system shown in
FIG. 8;
[0038] FIG. 10a shows an anterior front view of an element of the
system of FIG. 8;
[0039] FIG. 10a shows an anterior front view of a component of the
system of FIG. 8;
[0040] FIG. 10b shows a front view of a dumbbell comprised in the
system of FIG. 8;
[0041] FIG. 10c shows a rear front view of the component shown in
FIG. 10a;
[0042] FIG. 11 shows a sectional front view of the dumbbell shown
in FIG. 10b;
[0043] FIG. 12 shows a further sectional front view of the dumbbell
shown in FIG. 10b; and
[0044] FIG. 13 shows an exploded view of the dumbbell shown in FIG.
10b.
DESCRIPTION OF SPECIFIC EMBODIMENTS OF THE INVENTION
[0045] In the various figures, similar parts will be indicated with
the same numerical references.
[0046] With reference to FIG. 1, the automatic weight adjustment
system S for a dumbbell, object of the present invention,
essentially comprises a supporting frame 1, a first dumbbell 2, and
a second dumbbell 3 housed on said supporting frame 1.
[0047] Said supporting frame 1 comprises a first pair of housings
11 and a second pair of housings 12.
[0048] Said supporting frame 1 also comprises a raise element
13.
[0049] Said first dumbbell 2 comprises a first handgrip 21, which
extends axially according to an axis R, around which said first
handgrip 21 is able to rotate clockwise and counterclockwise.
[0050] Said first handgrip 21 has a first end 211 and a second end
212.
[0051] A first plurality of weights P1 is associated with the first
end 211, whereas a second plurality of weights P2 is associated
with the second end.
[0052] Each weight of said first P1 and second P2 plurality of
weights is shaped so as to ensure a shaped-coupling with the
contiguous weights.
[0053] In a first embodiment, a gear 213 is arranged on said first
end 211, integral with said first handgrip 21, in particular a
toothed wheel.
[0054] Without departing from the scope of the present invention,
said gear 213 can also be arranged on said second end 212.
[0055] Locking means are arranged on each of said first 211 and
second 212 ends for fixing each weight to said first handgrip
21.
[0056] In particular, with reference to FIGS. 2 and 3, a first
locking means 214 is fixed on said first end 211, whereas a second
locking means 215 is fixed on said second end 212.
[0057] When said first dumbbell 2 rests on said supporting frame 1,
said first plurality of weights P1 arranges in a housing of said
first pair of housings 11, whereas said second plurality of weights
P2 arranges in the remaining housing of said first pair of housings
11.
[0058] Said first handgrip 21 arranges raised and in contact with
said raise element 13.
[0059] Said handgrip 21, as well as said second handgrip 31, is a
hollow cylindrical elongated body. Inside it, a first selector
element 20a and a second selector element 20b are housed, on the
surfaces of which helical grooves are formed, as shown in FIG.
13.
[0060] Said first 20a and second 20b selector element are movably
coupled to said first handgrip 21, by means of a plurality of pins
20c, integral with said first handgrip 21.
[0061] Said first 20a and second 20b selector element are able to
pass from a closing position, in which they are contained entirely
inside said first handgrip 21 and facing each other, towards a
plurality of opening positions wherein they move away from each
other rotating according to said R-axis, moving according to
opposite directions of said R-axis.
[0062] The rotation and therefore the progressive displacement of
said first 20a and second 20b selector element is caused by the
rotation of said first handgrip 21, transmitted to said first 20a
and second 20b selector element by means of said plurality of pins
20c that are able to slide, as a cam, in the helical grooves of
said first 20a and second 20b selector element. Similarly, the
second dumbbell 3 has the same structure of said first dumbbell
2.
[0063] In particular, said second dumbbell 3 comprises a second
handgrip 31 that axially develops according to the R-axis, around
which said second handgrip 31 is able to rotate clockwise and
counterclockwise.
[0064] Said second handgrip 31 has a first end 311 and a second end
312.
[0065] A first plurality of weights P3 is associated with the first
end 311, whereas a second plurality of weights P4 is associated
with the second end.
[0066] On said first end 311 a gear 313 is arranged, which is
integral with said second handgrip 31, in particular a toothed
wheel.
[0067] Without departing from the scope of the present invention,
said gear 313 can also be arranged on said second end 312.
[0068] Locking means are arranged on each of said first 311 and
second 312 ends for fixing each weight to said second handgrip
31.
[0069] In particular, with reference to FIG. 2, a first locking
means 314 is fixed on said first end 311, whereas a second locking
means 315 is fixed on said second end 312.
[0070] When said second dumbbell 3 rests on said supporting frame
1, said first plurality of weights P3 arranges in a housing of said
second pair of housings 12, whereas said second plurality of
weights P4 arranges in the remaining housing of said second pair of
housings 12.
[0071] Said second handgrip 31 arranges raised and in contact with
said raise element 13.
[0072] With reference to FIGS. 5-7, said adjustment system S
comprises a first actuating device 4 and a second actuating device
5.
[0073] Said first 4 and second 5 actuating devices are fixed to
said supporting frame.
[0074] In particular, said first actuating device 4 is fixed near
said first dumbbell 2, and said second actuating device 3 is
arranged near said second dumbbell 3.
[0075] Said first actuating device 4 comprises a motor 41, which
feeds a worm screw 42, rotatably coupled to said supporting frame
1, whereas said second actuating device 5 comprises a motor 51,
which feeds a worm screw 52, rotatably coupled to said supporting
frame 1.
[0076] In particular, said worm screw 42 engages with said gear 213
of said first dumbbell 2, causing the rotation of said first
handgrip 21 around said R-axis, whereas said worm screw 52 engages
with said gear 313 of said second dumbbell 3, causing the rotation
of said second handgrip 31 around said R-axis.
[0077] With reference to FIG. 4, said system S comprises a logic
control unit U capable of sending control signals for the operation
of said first 131 and second 131' actuating device.
[0078] In particular, said logic control unit U sends signals to
said motors 41 and 51, so as to select the number of weights from
said plurality of weights P1, P2, P3, and P4 to be blocked to said
first 21 and second 31 handgrip for carrying out a gymnastic
exercise.
[0079] Said logic control unit U is capable of exchanging signals
by means of wireless connections of the wireless or Bluetooth.RTM.
types with a remote device D.sub.R, such as a smartphone or the
like.
[0080] The operation of the automatic weight adjustment system S
for a dumbbell object of the present invention is as follows.
[0081] When a user wishes to carry out a strength exercise using a
first dumbbell 2 and/or a second dumbbell 3, it is initially
necessary to adjust the weight of said first dumbbell 2 and/or
second dumbbell 3 before lifting it from the supporting frame
1.
[0082] The description refers to the first dumbbell 2, however, it
is unchanged also for the second dumbbell 3.
[0083] Said motor 41 puts in rotation said worm screw 42, which
engages with said gear or toothed wheel 213 of said first dumbbell
2.
[0084] Since said toothed wheel 213 is integral with said first
handgrip 21, this starts rotating towards a weight locking or
unlocking position, around said R-axis.
[0085] The rotation of said first handgrip 21 causes the rotation
of said plurality of pins 20c, which, moving in the helical grooves
of said first 20a and second 20b selector element, cause their
rotation and therefore the displacement from said closing position
towards said opening positions, which correspond to the number of
weights to be taken from said plurality of weights P1 and P2.
[0086] Said first selector element 20a progressively inserts into
the holes of each weight of said first plurality of weights P1,
whereas said second selector element 20b progressively inserts into
the holes of each weight of said second plurality of weights
P2.
[0087] The weights are coupled together by means of shape coupling,
so that, by lifting the first dumbbell 2 from said supporting frame
1, the selected weights from said first 20a and second 20b selector
element remain integral with the first dumbbell 2, whereas the not
selected weights remain housed on said supporting frame 1.
[0088] The user can select on the remote device D.sub.R the amount
of weight to be used for carrying out a gymnastic exercise.
[0089] The remote device D.sub.R sends corresponding signals to
said logic control unit U, which in its turn sends command signals
to said motor 41.
[0090] Said motor 41, by activating said worm screw 42, puts in
rotation said first handgrip 21, around said rotation R-axis, from
a locking position to an unlocking position and vice versa, for
locking or unlocking the weights of said first P1 and second P2
plurality of weights.
[0091] With reference to FIGS. 8-13, a second embodiment of the
system S' is described, which is different from the system S
described above, for the actuating device.
[0092] In particular, in the second embodiment, said system S'
comprises a first actuating device 4' for said first dumbbell 2,
and a second actuating device 5' for said second dumbbell 3.
[0093] Said first actuating device 4' comprises a motor 41', a
first gear 42', and a second gear 43'.
[0094] Said first actuating device 4' also comprises a lock/unlock
pin 44'.
[0095] Said lock/unlock pin 44' is capable of passing from an
engagement position to a disengagement position with said second
gear 43', following the actuation by said first dumbbell 2, and of
passing from said disengagement position to said engagement
position with said gear, due to a spring, when said first dumbbell
2 is not inserted in said supporting frame 1.
[0096] Furthermore, in this second embodiment, said first dumbbell
2 also comprises a lock/unlock pin 216, and said second dumbbell 3
also comprises a lock/unlock pin 316.
[0097] Said lock/unlock pin 216 is capable of passing from a
lowered position to a raised position by means of a spring, not
shown in the figure.
[0098] Similarly, said lock/unlock pin 316 is capable of passing
from a lowered position to a raised position by means of a spring,
not shown in the figure.
[0099] Similarly, said second actuating device 5' comprises a motor
51', a first gear 52', and a second gear 53'.
[0100] Said second actuating device 5' also comprises a lock/unlock
pin 54'.
[0101] Said lock/unlock pin 54' is capable of passing from a first
engagement position to a second disengagement position with said
third gear 53', by means of a spring not shown in the figure.
[0102] Said motor 41' is capable of putting in rotation said first
gear 42', which puts in rotation said second gear 43'.
[0103] Said second gear 43' engages with said gear 213 of said
first dumbbell 2, which therefore causes the rotation of said first
handgrip 21.
[0104] Said lock/unlock pin 216 of said first dumbbell 2 is able to
come in contact with said lock/unlock pin 44' of said first
actuating device 4' and to cause its displacement from said first
engagement position towards said second disengagement position with
said second gear 43', as will be described in detail below.
[0105] Furthermore, in this second embodiment, said supporting
frame 1 also comprises a first fixed pin 14 capable of engaging
with an opening obtained in said second locking means 215, so as to
prevent the rotation of said first handgrip 21.
[0106] Furthermore, said supporting frame 1 also comprises a second
fixed pin 15 capable of engaging with an opening obtained in said
second locking means 315, so as to prevent the rotation of said
second handgrip 31.
[0107] The operation of said second embodiment of said system S'
takes place as described for the previous embodiment.
[0108] In particular, it differs in the following features.
[0109] The description refers to the first dumbbell 2, however, it
remains unchanged also for the second dumbbell 3.
[0110] When said first dumbbell 2 rests on said supporting frame 1,
said lock/unlock pin 216 of the first dumbbell 2 is in contact with
said lock/unlock pin 44' of said first actuating device 4', pushing
it downwards, therefore said lock/unlock pin 44' of said first
actuating device 4' is in said second disengagement position.
[0111] Therefore, on the basis of the weight selected by the user,
said motor 41' puts in rotation said first gear 42', which puts in
rotation said second gear 43', which, in turn, puts in rotation
said gear 213 of said second dumbbell 2.
[0112] Since said gear 213 is integral with said first handgrip 21,
this begins to rotate towards a weight locking or unlocking
position, around said R-axis.
[0113] Consequently, the ends of said first handgrip 21 extend and
engage or disengage from said first P1 and second P2 plurality of
weights, as described for the first embodiment.
[0114] By means of said opening 214a, it is possible to display the
number corresponding to the selected weight.
[0115] When said first dumbbell 2 is lifted by the user from said
supporting frame 1, a spring pushes down said lock/unlock pin 216
of said first dumbbell 2, blocking its rotation, at the same time,
a spring pushes into the first engagement position said lock/unlock
pin 44' of said supporting frame 1, which locks said second gear
43' of said first actuating device 4'.
[0116] As is evident from the above description, the adjustment
system object of the present invention allows the automatic and
mechanically simple and reliable adjustment of the weight of a
dumbbell for carrying out a gymnastic exercise.
[0117] The present invention has been described for illustrative
but not limitative purposes, according to its preferred
embodiments, but it is to be understood that modifications and/or
changes can be introduced by those skilled in the art without
departing from the relevant scope as defined in the enclosed
claims.
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